Smell during masturbation

Hi when i'm masturbating when the shaft of my penis gets hard and before I'm close to ejactuating, my penis starts to smell. It also transfers to my hands and smells fish-like. I went to the doctors and he said nothing was wrong but it never use to do this. I'm circumised if that helps. Any help would be handy.

There was a guy who posted in here, saying that his penis stunk, and that he was circumcised. He went to the doctor, who diagnosed it as gardnerella, and gave him something which made it go away. Gardnerella is the the same bacteria which causes bacterial vaginosis in females, with a similar smell.